Re: [BLAST_SHIFTS] HVGUI

From: Michael Kohl (kohlm@mit.edu)
Date: Wed Dec 01 2004 - 12:35:08 EST


Hi Pete,

is the voltage increase an attempt to increase the efficiency of LT9B
based on a too weak raw signal *after* checking at the detector *and* in
the Dtunnel? (It could also be a bad BNC connector!)
The flasher for LT9 still looks fine, and also the ADC spectrum of
LT9B does not look too bad either. It could also be a bad channel on the
analog splitter or a bad lemo of the coax ribbon towards the
discriminator or the discriminator channel itself.

The flasher RT6 seems indeed dead, in addition LT3 and RT5,7,11
inefficient (raw_tof_flasher_with_beam.C). However, there are only
attenuators at the flasher splitter panel for channels RT5 and RT11
available, all other attenuators have been removed according to my elog
message 23377. There might be attenuators at the joints to the detector
though, best time to check this is the next maintenance day.

Regards,

  Michael

On Mon, 29 Nov 2004, Peter Karpius wrote:

> Hi Shift Takers-
>
> If you reboot the HVGUI, please set LTOF9B to -2400V. This has
> not been written to the database since it is still under investigation.
>
> Thanks,
> Pete
>
> ----------------------------------------------
> Pete Karpius
> Graduate Research Assistant
> Nuclear Physics Group
> University of New Hampshire
> phone: (603)978-6152
> FAX: (603)862-2998
> email: karpiusp@einstein.unh.edu
> http://pubpages.unh.edu/~pkarpius/homepage.htm
> ----------------------------------------------
>
>

-- 

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